The aim of this paper is two-fold. First, it explains what a constitutivist theory of reasons is and why the theory promises to deliver the holy grail of moral philosophy, which is an argument to the conclusion that each of us would choose to act morally if we had and exercised the capacity to respond rationally to the circumstances in which we find ourselves. Second, it describes the various parts of a constitutivist theory of reasons, and it explains how these parts give support to the premises required for the promised argument.The aim of this paper is two-fold. First, it explains what a constitutivist theory of reasons is and why the theory promises to deliver the holy grail of moral philosophy, which is an argument to the conclusion that each of us would choose to act morally if we had and exercised the capacity to respond rationally to the circumstances in which we find ourselves. Second, it describes the various parts of a constitutivist theory of reasons, and it explains how these parts give support to the premises required for the promised argument.

Universitat Pompeu Fabra